rasionalkan 5/3+√5 penting nih bantuin yah yg baik :)

5(3-√5)/(3+√5)(3-√5)
=5(3-√5)/4

[tex] \frac{5}{3+ \sqrt{5} } = \frac{5}{3+ \sqrt{5} } . \frac{3- \sqrt{5} }{3- \sqrt{5} } = \frac{15-5 \sqrt{5} }{9-5} = \frac{15-5 \sqrt{5} }{4} [/tex]